How to constanly monitor LogCat file?

Question

I need to somehow monitor the LogCat log, meaning that while my service is running I need to read the LogCat for new entries. At this moment I know only how to retrieve once

Answer 1

You can create a new thread to running the logcat(without the option -d) in the background.

Note: Use the buffer events instead of the process ActivityManager, it is more accurate. "logcat -b events"

Answer 2

This is how I did it, using Jiahao Liu's suggestion:

ReadThread thread;

public void startRecordingLogs()
{
  if(thread == null || !thread.isAlive())
  {
    ReadThread thread = new ReadThread();
    thread.start();
  }
}

public String stopRecordingLogs()
{
  String results = thread.stopLogging();
  return results;
}

private class ReadThread extends Thread{

  String results;
  Process process;
  Object lockObject = new Object();

  public void run(){
    synchronized(lockObject)
    {
      process = Runtime.getRuntime().exec("logcat -v time");        

      reader = new BufferedReader(new InputStreamReader (process.getInputStream()));

      String line;
      final StringBuilder log = new StringBuilder();
      String separator = System.getProperty("line.separator"); 

      while ((line = reader.readLine()) != null)
      {
        log.append(line);
        log.append(separator);
      }
    }

    results = log.toString();
  }

  public String stopLogging()
  {
    process.destroy();
    synchronized(lockObject)
    {
      return results;
    }
  }
}